Rotary abrader



DeC. 19,

R' A' FONTAINE ROTARY ABRADER Filed Sept. 22, 1945 2 Sheetsnsheet l D. 19, 1944. R A FONTAINE A'2,365,462

ROTARY ABRADER Filed sept. 22, 1945 2 sheets-sheet 2 Patented Dec. 19, 1944 ROTARY ABRADER Raymond A. Fontaine, Hamden, Conn., assigner of one-half to NathanE. Cooper, 'NewHavem Conn.

application september 22, 194s, seriarNotsoaan (orzo-2:8)

4 Claims.

lThe present invention relatesv to improvements in rotary abraders of the type suitable-for rougheningfthesurfaces of tire oasings, though available for use in connection with other work requiring a roughening or rasping action.

One of the objects of the present invention is to provide a superior rotary abrader having a multiplicity of removable abrading-elements and soconstructed and arranged as to render convenient and rapid the removal and replacement of the said multiplicity of abrading-elernents.

Another object of the present invention is to provide a rotary abrader or rasp which includes a plurality of Imounting-members each mounting a multiplicity of abrading-elements, together with supporting-means for 'the said mountingmembers, the abrader having a superior construction and arrangement of parts whereby the mounting-members may be conveniently separated from the supporting-means and whereby each of the said mounting-members may have its multiplicity of abrading-elements rapidly and conveniently removed and replaced.

With the above and other objects in view, as will appear to those skilled in the art from the present disclosure, this invention includes all features in the said disclosure which are novel over the prior art.

In the accompanying drawings, in which certain modes of carrying out the present invention are shown for illustrative purposes:

Fig. 1 is a view partly in side elevation and partly in section of one form of rotary abrader embodying the present invention;

Fig. 2 is an edge viewthereof partly in section on the line 2-2 of Fig. 1;

Fig. 3 is a perspective view of the group of mounting-plates or -members;

Fig. 4 is a perspective view of one of the supporting-wheels, viewing the same mainly from its inner face; v

Fig. 5 is a similar viewof the complemental supporting-wheel; and

Fig. 6 is a perspective View of one of the abrading-elements.

. with an annular groove I6. The location of the groove Ilrresultsin the formation on the seatlange I5 of a retaining-flange Il spaced out- 1 wardly from the outer surface of `the telly-like flange yIll and extending in substantial parallelism with the axis of the device in a direction generally toward the web I3,` V"I'he two complemental `supporting-wheel's I0 and II may be jointly mounted for rotation in any Nsuitable manner such, for instance, as by havinga driving-spindle or -arbor I8 extended through theirrespective hubs I2-I2` as is espcially well shown in Fig. 2. The driving-spiridle I8 is formedA with an annular shoulder I9 against which the outer face of one of the hubs I2isnormally seated. he'hub `I2 of the complemental supporting-wheel is engaged .by a waslierzU which, turn, is pressed against the adjacent 'hub 'I2 by a clamping-hut `2I Vthreaded upon the adjacent portion of thedriving-spindle'IB; I

Supported by the two complirieiital support'- ing-wheels I Il and `I arie three (iiir or less) arcuate mounting-plates or -r'nernbers22, 2`3 and 24eacli having theinner'face and outer face of respective opposite side edges cnznnfered` as at 25 for purposesas will hereinafter appear. The opposite side edges of each ofthe mounting-plates 2223 and 24 `are respectively entered into therespective annular-grooves ISL-I6 of the supporting-wheels I0 and II, so asto lie beneath The particular rotary abrader chosen forpur'- said supporting-wheels includes a centrally-aperr I would normally permit a slight degree of endwise play between thel ends of tlie mounting'- tured hub I2, a radially-extending web I3 projecting from one end of the said hub and a fellyof the web I3 `and extending therefrom in the the respective. retainingdangers `I I-I 1 thereof. Each ofthe grooves IGw-Ithasboth of its respec- .Y tive inner and-outer walls chanifered or tapered as at2', to act in conjunction with the chamferoci` edges'of the said mounting-plate to facili-' plates 221, 23 and 24, and to guard against this, eachA of the saidl plates provided in one of its ends with one or more spacing-pins 21 mounted with -a drive-fit.

Each of the mounting-plates 22, 23 and 24 is formed with a multiplicity of radial holes 28 in each of which is mounted the shank 29 of one of a multiplicity of abrading-elements 30. Each of the .particular abrading-elements shown is of y tack-like form and includes, in addition to its shank 29, a head 3I having its under face normally seated against the inner face of the particular mounting-plate in which the abradingelement is mounted. The shank 29 of eachof the abrading-elements 30 is pointed at its outer end and its body-portion is preferably proportioned so as to fit its complemental hole 28 with a drive-fit. As thus mounted, the head 3| of each of the abrading-elements is located between the inner face of the arcuate mounting-plate in which it is mounted and the outer face of the fellylike ange I4 of the adjacent supporting-wheel IIl or II.

To facilitate the assembly of the mountingplates 22, 23 and 24 in the predetermined desired relationship and guard against their displacement in a circumferential direction, each is provided with a feature intertting with a feature in one of the supporting-wheels, as will now be described. The arcuate mounting-plate 22 is formed in one side edge about midway of its length with a notch 32 adapted to fit over a locating-pin or abutment 33 rigidly mounted in the seat-flange I of the supporting-wheel II in position to project from the bottom of the groove IS. Diametrically opposite the locating-pin 33 is positioned a locating-block or -abutment 34 rigidly mounted in the bottom of the groove I6 of the supporting-wheel II. To iit the locatingblock 34, the arcuate mounting-plates 23 and 24 are respectively formed in their adjacent corners with notches 35 and 36.

The web I3 of the supporting-wheel I0 is formed adjacent the complemental felly-like flange I4 with three (more or less) apertures 31,

while the web I3 of the complemental supporting-wheel II is formed with three (more or less) apertures 33 located, however, adjacent the hub I2 of the said supporting-wheel II. By the described arrangement, the said apertures 31 and 38 in one supporting-wheel will not register with the apertures in the complemental supportingwheel in any relative rotational position of the two said supporting-wheels. In disassembling the supporting-wheels I0 and II from the arcuate mounting-plates 22, 23 and 24 and from each other, a tool inserted through any one of the apertures 31 or 38 may be brought into engagement with a solid surface of the web I3 of the opposite supporting-wheel to enable the two said supporting-wheels to be driven apart.

The assembled rotary abrader will, as is well .known in the art, be rotated at high speed by means of the driving-spindle or -arbor I8, with the result that in addition to the frictional engagement of the shank 29 of each abrading-element 30 with its complemental hole 28, centrifugal force will tend to maintain the said abrading element in the position shown in the drawings. Should, for any reason, an abrading-element become loose, it cannot drop out of its mountingplate, since the felly-like ange I4 adjacent thereto will prevent such action. It is preferred that the outer radii of the felly-like flanges I4 be sufciently smaller than the radii of the inner avoid the jamming of the heads 3l of the abrading-elements.

By providing a plurality of arcuate mountingplates rather than one continuous rim, the abrading-elements 30, or their equivalent, may be readily installed in and removed from a given one of the said mounting-plates. The abradingelements 30, or their equivalent, are driven into their respective holes 28, as before noted, with a tight force-fit, and since each mounting-plate is merely arcuate form, rather than a continuous circle, the workman has free access for driving the said abrading-element into place and for prying or driving the'same loose. It is to be borne in mind in this connection, that abradingelements such'as 30 become worn and require replacement at frequent intervals. By means of the present invention, the previous tedious and time-consuming operation of removing and replacing abrading-elements is rendered both convenient and rapid.

The invention may be carried out in other specific ways than those herein set forth without departing from the spirit and essential characteristics of the invention, and the present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, and all changes coming within the meaning and equivalency range of the appended claims are intendedto be embraced therein.

I claim:

1. vA rotary abrader, including in combination: an annular series of physically-distinct arcuate mounting-plates arranged end-to-end to jointly form a substantial ring, each of the said mounting-plates being formed with a multiplicity of substantially-radial holes; a multiplicity of removable and replaceable abrading-elements extending outwardly through the respective holes of each of the said arcuate mounting-plates and projecting beyond the outer periphery thereof, each of the said abrading-elements having stopmeans engageable with the inner periphery of a given mounting-plate; and supporting-means adapted to be propelled by a spindle or the like and constructed and arranged to support the said annular series of arcuate mounting-plates in the described end-to-end relationship and including means to hold the said series of arcuate mounting-plates against radial displacement under the urge of centrifugal force when the abrader is rotated, and means underlying the respective inner ends of the multiplicity of abrading-elements to 1imit the inward displacement thereof when work is forced against the projecting outer ends of the said abrading-elements.

2. A rotary abrader, including in combination; an annular series of' physically-distinct arcuate mounting-plates arranged end-to-end to jointly form a substantial ring, each of the said mounting-plates being formed with a multiplicity of substantially-radial holes; a multiplicity ofremovable and replaceable abrading-elements extending outwardly through the respective holes of each of the said arcuate mounting-plates and projecting beyond the outer periphery thereof, each of the said abrading-elements having stopmeans engageable with the inner periphery of .a given mounting-plate; and a pair of complemental supporting-wheels adapted to be propelled by a spindle or the like and constructed and arranged to jointly support the said annular series of arcuate mounting-plates in the described end-to-end relationship, each of the said supporting-wheels including means coacting with the respective opposite side-edges of each of the said series of mounting-plates to hold the same against radial displacement under the urge of centrifugal force when the abrader is rotated, and means underlying the respective inner ends of the multiplicity of abrading-elements to limit the inward displacement thereof when work is forced against the projecting outer ends of the said abrading-elements.

3. A rotary abrader, including in combination: an annular series of physically-distinct arcuate mounting-plates arranged end-to-end to jointly form a substantial ring, each of the said mounting plates being formed with a multiplicity of substantially-radial holes; a multiplicity of removable and replaceable abrading-elements eX- tending outwardly through the respective holes of each of the said arcuate mounting-plates and projecting beyond the outer periphery thereof, each of the said abrading-elements having stopmeans engageable with the inner periphery of a given mounting-plate; and a pair of complemental supporting-wheels adapted to be pro-v pelled by a spindle or the like and constructed- `of mounting-plates adjacent the side-edges thereof to hold the same against radial displaceand replaceable abrading-elements carried by each of the said arcuate mounting-plates and projecting beyond the outer perlpherythereof; a pair of complemental supporting-wheels adapted to be propelled by a spindle or the like and each formed with a radially-projecting seatilange located adjacent its outer face and provided with a groove opening toward the similar groove in the seat-ange of the complemental supporting-wheel; a plurality of locating-abutments located in the groove in the seat-flange in one of the said supporting-wheels and respectively engaging with the respective locating-abutments of the said mounting-plates, the respective opposite side-edges of each of the said mounting-plates being entered into the groove in the seat-flange of one of the saidA supportingwheels.

RAYMOND A. FONTAINE. 

